A Pastel is a Pastel is a Pastel. Some of the lines do have variations in color, but you can find great examples of Pastels in every line...poor ones too. It really depends on the indivdual snake.
You'll hear Pastels refered to as: Lemons, NERDs, Graziani, Jungle, Citrus, and Partridge in a Pear Tree. Basicaly they are all Pastels.
$250 for a male is pretty high, even if he is a smoker. I think you can do better than $500 for the pair if money is your primary concern. If, however, you like the animals you've found and feel ok about the price, I say go for it. I've paid more than market value for some of my BPs, and less than market for others. I'm happy with all of them.